Sterically induced stoichiometry SIS

Figure 27.2 (a) Symmetry properties for core-shell structures where r,/r2 < 1.20 (b) sterically induced stoichiometry (SIS) based on respective radii (r,) and (r2) core and shell dendrimers respectively (c) Mansfield-Tomalia-Rakesh equation for calculation of maximum shell filling when r,/r2 < 1.20... 

Sterically induced stoichiometry (SIS) is manifested whenever the summation of dendrimer surface-group volumes and incoming reagent volumes approach available exterior volume surrounding the reactive dendrimer surface groups Z as illustrated in Figure 42. So long as the summation of the volumes and involved in bond formation with Z remains much less than 4/3 7t(r2 — r ), ideal... 

Fig. 42. Sterically induced stoichiometry (SIS) wherein Z = available dendrimer surface groups, R = chemically bound groups derived from a reagent (R )...

Fig. 31 (a) Symmetry properties of core-shell tecto(dendrimer) structures when ri/r2 < 1.20. (b) Sterically induced stoichiometry (SIS) defined shell capacities (A max). based on the respective core and shell radii, when ri/j-2 < 1.20. (c) Mansfield-Tomalia-Rakesh equatirai for calculating the maximum shell-filling value (capacity) (A/max)> when rjr2 > 1.20 [121, 138, 167]... 

---